diff --git a/Cargo.lock b/Cargo.lock
index 3d715c0..67e4730 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -246,6 +246,7 @@ name = "lolicron"
 version = "0.1.0"
 dependencies = [
  "futures",
+ "lazy_static",
  "notify",
  "sexp",
  "tokio",
diff --git a/Cargo.toml b/Cargo.toml
index 821a5ad..09344e6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,3 +16,4 @@ tokio = {version = "0.2", features=["time", "macros", "io-driver", "sync", "rt-c
 notify = "4.0"
 futures= "0.3"
 sexp = "1.1"
+lazy_static="*"
\ No newline at end of file
diff --git a/etc/other/included-file b/etc/other/included-file
new file mode 100644
index 0000000..e69de29
diff --git a/src/interval.rs b/src/interval.rs
index 324c8b5..e52564e 100644
--- a/src/interval.rs
+++ b/src/interval.rs
@@ -8,6 +8,7 @@ use std::{
     iter::FromIterator,
     
 };
+
 /// Interval for job, in miliseconds.
 #[derive(Debug,Clone,PartialEq,Eq,Hash,Ord,PartialOrd)]
 pub enum Unit
@@ -26,6 +27,7 @@ impl Unit
 {
     /// Multiplier to get to miliseconds
     #[inline]
+    #[cfg(nightly)]
     const fn multiplier(&self) -> u64 {
 	use Unit::*;
 	match self {
@@ -38,6 +40,27 @@ impl Unit
 	    Aeon => Year.multiplier() * 1000000,
 	}
     }
+    #[cfg(not(nightly))]
+    fn multiplier(&self) -> u64 {
+	use lazy_static::lazy_static;
+	use std::collections::HashMap;
+	
+	use Unit::*;
+	lazy_static! {
+	    static ref MUL_TABLE: HashMap<Unit, u64> = {
+		let mut map = HashMap::with_capacity(8);
+		map.insert(Second,  1000); 
+		map.insert(Minute,  Second.multiplier() * 60);
+		map.insert(Hour,  Minute.multiplier() * 60);
+		map.insert(Day,  Hour.multiplier() * 24);
+		map.insert(Week,  Day.multiplier() * 7);
+		map.insert(Year,  Week.multiplier() * 52);
+		map.insert(Aeon,  Year.multiplier() * 1000000);
+		map
+	    };
+	}
+	*MUL_TABLE.get(&self).unwrap()
+    }
 }
 
 /// A time object parsed from the definition file.
@@ -68,7 +91,10 @@ impl Time
 {
     fn into_abs(mut self) -> Result<Self, ParseError>
     {
-	self.absolute = Some(NonZeroU64::try_from(self.unit.multiplier().checked_mul(u64::from(self.value)).ok_or(ParseError::InvalidNumber(None))?)?);
+	self.absolute = Some(NonZeroU64::new(self.unit.multiplier()
+					     .checked_mul(u64::from(self.value))
+					     .ok_or(ParseError::nz_err())?)
+			     .ok_or(ParseError::nz_err())?);
 	
 	Ok(self)
     }
@@ -92,7 +118,7 @@ impl Time
     /// If `value` is less than 1 second (1000ms)
     pub fn from_ms(value: NonZeroU64) -> Self
     {
-	let value_sec = NonZeroU64::try_from(u64::from(value) / 1000).expect("absolute `value` is too small for `Time`");
+	let value_sec = NonZeroU64::new(u64::from(value) / 1000).expect("absolute `value` is too small for `Time`");
 	Self{
 	    unit: Unit::Second,
 	    value: value_sec,
@@ -101,9 +127,9 @@ impl Time
     }
     
     /// Attempt to create a new `Time` from miliseconds.
-    pub fn try_from_ms(value: NonZeroU64) -> Result<Self, num::TryFromIntError>
+    pub fn try_from_ms(value: NonZeroU64) -> Result<Self, ParseError>
     {
-	let value_sec = NonZeroU64::try_from(u64::from(value) / 1000)?;
+	let value_sec = NonZeroU64::new(u64::from(value) / 1000).ok_or(ParseError::nz_err())?;
 	Ok(Self{
 	    unit: Unit::Second,
 	    value: value_sec,
@@ -301,6 +327,15 @@ impl From<num::TryFromIntError> for ParseError
     }
 }
 
+impl ParseError
+{
+    /// Non-zero conversion error
+    const fn nz_err() -> Self
+    {
+	Self::InvalidNumber(None)
+    }
+}
+
 impl From<num::ParseIntError> for ParseError
 {
     #[allow(unused_variables)]
diff --git a/src/main.rs b/src/main.rs
index ce68936..6458f35 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -31,8 +31,8 @@ async fn do_thing_every() -> Result<(oneshot::Sender<()>, task::JoinHandle<()>),
 		    // Do the things
 		    println!("yes");
 		}
-		_ = &mut rx => {
-		    // We got cancel
+		command = &mut rx => {
+		    // We got interrupt, interpret `command` here
 		    println!("no");
 		    break;
 		}